A control method for an air conditioning system

Abstract

The invention provides a control method of an air conditioning system. The control method comprises a detection step, a judging step and a control step. In the detection step, the operation mode of the air conditioning system, the outdoor environment temperature T(outdoor environment) and the indoor environment temperature T(indoor environment) are detected; in the judging step, whether the operating mode is operated to a heating mode or not and whether the T(outdoor environment) is smaller than A or not are judged, wherein A is a constant; and in the control step, a fourth throttling device is controlled to be turned on when the operating mode is operated to the heating mode, and T(outdoor environment) is smaller than A, and the opening degree of the fourth throttling device is controlledto be smaller when T(setting)-T(indoor environment) is larger than C is detected; and if it is detected that T(setting)-T(indoor environment) is smaller than D, the opening degree of the fourth throttling device is adjusted to be larger, wherein C and D are constants. By means of the control method, the indoor temperature fluctuation is small during the defrosting of the whole air conditioning system, the time for recovering the heat supply is short, the heat supply can be recovered quickly, and sustainable indoor heating is effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a control method of an air conditioning system. Background technique [0002] The problem of frosting and defrosting of air source heat pumps is a key technical issue of air conditioning, which has a significant impact on heating performance and comfort. The total area of ​​hot summer and cold winter areas, cold areas and severe cold areas accounts for about 85% of the total area of ​​the country. These areas need heating in winter, and most of them will experience frost and defrost during heating in winter. [0003] Traditional heat pump air conditioners use a four-way valve reversing defrosting method during heating operation in winter. This method is simple to operate, but has the following disadvantages: 1. The indoor temperature fluctuates greatly and the thermal comfort is poor. 2. The temperature rises slowly. The frequency increase of the compresso...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the air conditioner in the prior art that the indoor temperature fluctuates greatly during the defrosting period, and the heating recovery time is long, so that the indoor sustainable heating cannot be guaranteed, so as to provide an air conditioning system control method

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